Edgar w



(No Model.)

E. W. HAZAZER.

ELECTRIC BELL.

No. 362,005.- Patented Apr. 26, 1887.

n. Pugs; Phofwutm rapher. Wnhinglnn, no.

UNITED STATES PATENT OFFICE.

EDGAR XV. HAZAZER, OF- NEW YORK, N. Y., ASSIGNOR TO HAZAZER 8:

STANLEY, OF SAME PLACE.

ELECTRIC BELL.

SPECIFICATION forming part of Letters Patent No. 362,005, dated April 26, 1887.

Application filed December 16, 1886, Serial No. 211,760. (No model.)

To all whom it may concern.-

Be it known that I, EDGAR W. HAZAZER, of New York city, in the county and State of New York, have invented a certain new and useful Improvement in Electric Bells, of which the following'is a specification.

The object of my invention is to produce a simple, cheap, and efficient electric bell, and especially to provide a simple and efficient means for attaching the bell to the wall or other support, and making the connections between the electrical portions of the bell mechanism and the wires extending to it, whereby the binding -posts, which have heretofore been placed upon the bell-case, and which are expensive and unsightly, are done away with.

To this end my invention mainly consists in providing a suitable back or base plate for supporting the bell, on which are placed suitable contact plates or devices, and in providing the bell-case or hell mechanism with corresponding contact devices, whereby when the case holding the mechanism is secured upon such back or base plate the electrical connections are at once completed through the bell mechanism, the wires having been already connected with the base-contacts; and my invention further consists in the various novel devices and combinations of devices employed by me in accomplishing the above'named objects, as hereinafter set forth and claimed.

My invention is illustrated in the accompanying drawings, in which Figure l is a rear elevation of the case inelosing and supporting the -bell mechanism; Fig. 2, a vertical section on the line was of Fig.

- 1 of the bell and base-plate; Fig. 3, a front elevation of the base-plate, and Fig. i a vertical section thereof.

A is a suitable base-plate, of wood or other insulating material, having screw-holes a (1, whereby it may be secured by screws 1) to the wall B,or other suitable object. The plate A is provided with two small binding-screws, c and c, and has also inserted in it from the back, before placing it upon the wall, an externally and internally screw-threaded thimble, d. The insulated wires 0 e of the bellcireuit, extending through or along the wall B, pass through plate A, and are connected, respectively, to binding-screws c and c,and from binding-screw c a wire, 6 extends through the wood of the base and is secured beneath the head of the thimble d. From binding-screw c a fiat contact spring, f, extends. It is evident that the contacts might be placed directly upon the wall instead of upon a baseplate, though the use of such baseplate is obviously preferable.

C is the box inclosing and carrying the works of the bell. It is preferably cast in one piece of iron and with a projecting arm, D, ex

tending above it, carrying the gong E, and with an aperture, 9, through which the bellarm F passes. The box, 0 is adapted to fit over and be secured upon the base-plate A.

G are the magnet-spools, whose cores are preferably secured directly to the iron box, which therefore forms the yoke or back piece of the magnet. Upon the insulating-head h of one of the spools is set a small metal pin, 43, to which one end of the magnet-wire z" is attached. H is the vibrating armature, carrying the bell-arm F. This armature consists of an iron strip having a slot at its pivoted end, forming tongues ll, which are bent out in opposite directions and formed into bearing-pinsmm, one of which is stepped in a socket, az, formed in the front of the box, while the other enters an aperture in a plate, 0, secured toa shoulder or a lug, 12, formed in the corner of the box. The armature carries a circuit making and break ing spring, 1', which makes and breaks contact with the adjustable contact-screw 8, extending through the side of the box, and preferably arranged and constructed as set forth in my patent reissued October2l, 1884, No. 10,533. The magnet-wire 1" extends to screw 8. Another spring, t, extends from the other end of the armature and rests against a screw, it, preferablya split screw, which is adjustable through the ease, whereby the tension of spring t and the movement of the armature may be ad justed.

It will be seen that the circuit through the bell mechanismis as follows: From pin t around the magnets by wiredand to screw 8, thence to the armature, and thence by the armaturebearings and spring 15 to the case.

In placing the bell in position the plateAis first secured to the wall and the circuit-connections made thereto, as already described,

and the box 0 is then placed over the plate, and is secured thereto by the insertion of the long screw 1;, which passes through the front of the box, a sleeve or bushing, 10, being preferably provided to make a guide and a good bearing for the screw, and into the thimble cl. This furnishes a secure mechanical connection between the box and the back plate, and at the same time completes the electrical circuit by joining the box with thimble d, the circuit being then: wire 6 to binding-screw 0, contactspring f to pin 2', through the bell mechanism to the box, as already explained, by screw '0 to thimble d, wire 6 to binding-screw c and circuit-wire It will be seen thatv an exceedingly ready and simple arrangement for placing the box in position and making the connections is thus provided. None of the wires and none of the electrical connections are exposed, and the expensive binding-screws which it has heretofore been necessary to place upon the outside of the box are dispensed with.

What I claim is 1. The combination of a base-plate, circuitwires extending thereto, and terminals for said wires upon said base-plate, a box inclosing and carrying the works of an electric bell, means for securing said box upon said base-plate,and means for completing circuit from the base terminals through the bell mechanism, substantially as set forth.

2. The combination, with a baseplate provided'with contacts, of a box inclosing and carrying the works of an electric bell and corresponding contacts carried by said box, whereby the bell-circuit is completed by the attachment of the box to the base-plate, substantially as set forth.

3. The combination of an insulating baseplate provided with contacts, a metal box in closing and carrying the works of an electric bell and forming part of the bell-circuit, an insulated contact carried by said box adapted to meet one of said base-plate contacts, and a securing device electrically and mechanically connecting said box with the other base-plate contact, substantially as set forth.

4:. The combination of the insulating baseplate, the thimble secured therein, to which a circuit-wire is connected, the metal box inclosing and carrying the works of an electric bell, the screw passing through said box and entering said thimble, and electrical connections,whereby the bell-circuit is completed by the insertion of said screw, substantially as set forth.

5. The combination of the insulating baseplate, the contact-spring thereon, the metal inclosing-box, the pin on the magnet-head adapted to meet said spring, a circuit from said pin through the bell mechanism to the box, and a securing device for said box,whcreby the circuit is completed by the attachment of said box to said base-plate, substantially as set forth.

6. The combination of the insulating baseplate, the metal thimble secured therein, to which a circuit-wire is connected, the contactspring secured to said plate and to which the other circuit-wire is connected, the metal inclosing box, the pin on the magnet head adapted to meet said contact-spring, connections through the bell mechanism from said pin to the box, and the screw passing through said box and entering said thimble, substantially as set forth.

This specification signed and witnessed this 9th day of December, 1886.

EDGAR V. HA ZAZ ER.

Vitnesses:

WM. PELZER, E. C. ROWLAND. 

